Reversing and cut-off mechanism for engines.



No. 67!,834. Patented Apr. 9, 190i. W..A. mum/m.

REVERSING AND CUT-OFF MECHANISM FOR ENGINES.

(Applicatiop filed Feb. 14, 1900.)

(No Model.)

W/ 7W 5 SSE S nu: mums PETERS ca. PNDTO-HI'HOI. WASNINGYON. n c.

UNITED STATES PATENT OFFICE.

WILLIAM ASBURY MILLIGAN, OF STRASBURG, ILLINOIS.

REVERSING AND CUT-OFF MECHANISM FOR ENGl NES.

SPECIFICATION forming part of Letters Patent No. 671,834, dated April 9, 1901.

Application filed February 14,1900. Serial No. 5,208. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM ASBURY MIL- LIGAN, a citizen of the United States, and a resident of Strasburg, in the county of Shelby and State-of Illinois, have invented a new and Improved Reversing and Out-Off Mechanism for Engines, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved reversing and on t-ofE mechanism designed for use on the various types of engines, notably locomotive and traction engines, said mechanism being simple and du rable in construction, completely under the control of the engineer, and arranged to be easily manipulated to readily shift the enginevalves for cut-oft or reversing purposes.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claim.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is an end elevation of the improvement as applied to a locomotive-engine. Fig. 2 is an enlarged sectional end view of the same. Fig. 3 is aplan view of part of the same, and Fig. 4 is a sectional side elevation of the same on the line 4 4: in Fig. 2.

The improved reversing and cut-oft mechanism illustrated in the drawings is applied to the axle or driving-shaft A, carrying at its ends the drivers A, having wrist-pins A set to quarter positions and connected in the usual manner with the pistons reciprocating in the engine-cylinders. On the axle A between the drivers A is arranged a sleeve B, preferably made square in cross-section and secured by set-screws O or other suitable means to the axle, so as to rotate with the same.

On the sleeve B are formed two sets of guideways 13, set at quarter positions, the same as the wrist-pins A and each ofthe said guideways B is engaged by the eccentric-disk D of an eccentric D, connected in the usual manner with the link mechanism of the valves of the engine. Each eccentricdisk D is mounted to slide across the sleeve for reversing and cut-01f purposes, and for this purpose each disk is formed with an elongated opening D for engagement with the sleeve 13, as plainly shown in Fig. 4, and also for engagement by two wedges E E, mounted to slide lengthwise of the sleeve on opposite sides thereof, the wedges extending in opposite directions, so that when the wedges are simultaneously moved outward or inward a shifting of the disk D takes place on the guideways B in a direction across the sleeve, so that a corresponding shifting of the link mechanism and the valve mechanism takes place for reversing or cut-01f purposes. The ends of the two wedges E E are attached at opposite sides of the eccentric to disks E E extending loosely around the sleeve B, and the two innermost disks E for the two sets of wedges are rigidly connected with each other by bars E so that movement given to one set of Wedges causes a corresponding movement of the other set of wedges, so that the two disks D for the two eccentrics are simultaneously shifted to uniformly set the valves in the two locomotive-engines correspondingly. One of the disks E is provided on its peripheral surface with a shifting-ring F, engaged by a shifting-lever Gr under the control of the engineer, so that when the latter imparts a swinging motion to said lever G then the ring F imparts a corresponding sliding motion lengthwise of the sleeve to the sets of wedges, so as to shift the eccentrics accordingly for the purpose mentioned.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent A reversing and cut-oft mechanism for engines, comprising a sleeve adj ustably secured to the axle or driving-shaft to turn-therewith, the said sleeve being rectangular in' cross-section, two sets of guideways formed on the exterior of said sleeve, eccentrics having their disks formed with elongated slots and mounted to slide in said guideways across the sleeve, sets of Wedges engaging said elongated openings in said eccentric-disks, the wedges of each set extending in opposite directions relatively to each other and mounted to slide inn-ring, and a shifting-lever engaging said to lengthwise on the sleeve, disks to which the sh'i fting-ring, substantially as set forth. ends of the Wedges of each set are connected, In testimony where f I have signed my the said disks being mounted loosely on the name to this specification in the-presence of 5 sleeve at opposite sides of each eccentric, bars two subscribing Witnesses.

rigidly connecting the two innermost disks WILLIAM ASBURY MILLIGAN. for the two sets of wedges with each other, i \Vitnesses: one of the said innermost disks being pro- BENJAMINE W. KERR,

vided on its peripheral surface with a shift- EDWARD R. ALLEN. 

